Razor drive mechanism



Aug. 15, 1950 l. LONNE RAZOR DRIVE MECHANISM 'Filed' Jan. 24, 1945 3nventor fuel/A2 Lav/u:

I (Ittorneg Patented Aug. 15, 1950 RAZOR DRIVE MECHANISM Ingvar Lonne, Burbank, Calif.

Application January 24, 1945, Serial No. 574,290

6 Claims. (o1. 30-43) My invention relates to razors, particularly to the type known as mechanically operated or electric razors.

This application is a continuation in part my co-pending application for Blade, Serial No.

560,625, filed October 27, 1944 which matured as Patent No. 2,445,625 issued on July 27, 1948.

One of the principal objects of this invention is to provide a novel means for operating an inner shear member of a razor with respect to an outer shear member.

Another object of this invention is to provide -a novel resilient connection between the movable shear member and the means for operating the same, whereby substantially all wear between the shear members and between the movable shear member and the operating means is automatically taken up, thereby increasing the efficiency of the shearing means and the smooth and silent operation thereof.

An important object also of this invention is to provide, as a whole, a novel connection between a reciprocating and an oscillating drive member for automatically taking up any loose connection or lost motion between such members.

A further object of this invention is to provide a novel connection between a drive shaft or an eccentric on the drive shaft with an oscillating member for further reducing wear to a minimum, and thereby increasing the smooth and silent operation of such portion of the mechanism.

With these and other objects in view, as will appear hereinafter, I have devised a mechanical razor having certain novel features of construction, combination, and arrangement of parts and portions, as will be hereinafter described in detail andparticularly set forth in the appended claims, reference being had to the accompanying drawings, and to the characters of reference thereon, which form a part of this application, in which:

Fig. 1 is a view taken on the median line of a preferred form of my razor, the section being taken through I-I of Fig. 2;

Fig. 2 is a partial sectional view thereof taken through 2-2 of Fig. 1;

Fig. 3 is a fragmentary sectional view thereof, taken through 3-3 of Fig. 2, showing primarily the mechanical drive connection between the drive shaft and the movable shear member;

The razor shown in the drawings is shaped exteriorly similar to the conventional electric razor or shaver. It is enclosed in a split housing I and is provided at one end with a stationary blade or shear member 2 in which is reciprocally mounted a. removable or reciprocating blade or shear member 3.

Within the middle portion of the housing is positioned an electric motor M having a motor shaft iii, the axis of which extends perpendicularly to the plane of reciprocation of the shear member 3. The shaft is revolubly mountedon bearing plates II, one secured to a shoulder in each half of the split housing I. Near one end of the shaft is provided an eccentric I2 on which is mounted one end of a link I3, which is preferably made of insulating material, such as Bakelite. The free end of the link is connected to the inner end of an oscillating member I4. This oscillating member is pivotally mounted intermediate its ends, but near the other or outer end, on a pivot screw I 5 which is'secured in one member of the housing I. The latter end of the oscillating member I4 is reduced, as indicated by I4 and this reduced end extends toward the inner or movable shear member 3. Over the reduced end I4 of the oscillating member is positioned the leaf spring I6. This spring consists of an inner leg I6 which fits over the reduced portion I4, and is seated against a shoulder I4 at the inner end of the reduced portion. The outer end of the spring has a U-shaped portion Iii with an enlarged or looped end, providing substantially Fig. 4 is a wiring diagram of the electric motor a roller or cylinder which fits into a recess 3 provided at the inner side of the movable shear member 3, said recess being positioned transversely with respect to the direction of reciprocation of the shear member. The reduced end M of the oscillating member extends into the U-shaped portion of the spring, short of the end of the loop, for locating the outer or U-shaped portion of the spring. The U-shaped portion Iii is connected with the leg I6 by means of a loop I6 v By reason of such construction,the enlarged roller part at the end of the U-shaped portion resiliently seats the end of the oscillating member in the recess 3, and this enlarged or roller part of the bifurcated portion I6" is resiliently forced into-the recess 3 by the loop I6. The shaft I0 is the rotor'sh'aft of the motor, and on it is mounted the rotor consisting of an armature IT. The motor is shown as being provided with two field coils IS in line with each other and with the longitudinal axis of the hous.

ing. The source of energy for the razor is supplied from electric terminals IE1 at the end of the housing opposite the blades or shear members 2 and 3. One of the terminals is connected with one of the field coils while the other terminal is connected with the other field coil. In series with the connection between two field coils is a circuit breaker 20 consisting of a stationary contactflll and-a movable contact 20 the latter being provided at the end of a lever ll! pivotally mounted at its opposite end on a pin 21 within the housing. The contacts 28 and 20 are normally held in engagement by means ofa tortion spring 22 extending around the pivot-pin 2|.

In the modified form of construction, shown in Fig. 5, the contact 20 of the lever 20 is forced towards or in engagement 'withthe' contact 217i by means of a coil spring 23. r

The motor shaft in is provided with cams III .at itsopposite sides, these cams being shown as merely flatt'ened portions'at the opposite sides of theshaft IQ. Theinner or underside of the 'lever2il' has an insulating bearing plate 24 which rocking the lever 20about its pivotal axis against the tension of the spring 22 or 23, thereend portion of thesh aft l while the circuit breaker is piovided at the-opposite endof the "shaft. It will be here noted that the connection of the oscillatingmeinbei' with the link I3 is between thelink and the adjacent bearing plate I l. v

The oscillating member is bent outwardly around the, field coil and then inwardly to form the pivoted portion for the oscillating member. The

reduced portion M of the oscillating member is 4 mounted intermediate its ends on the support and having one end connected to the movable memher, a drive shaft on the support. an eccentric. and a link connected at one end to the eccentric and at its other end to the opposite end of the oscillating member, the axis of the eccentric being parallel to the pivotal axis of the oscillating member.

3. In a razor of the class described, a support,

a movable member reciprocally mounted thereon, an oscillating member pivotally mounted intermediate its ends on the support and having one end yieldably connected to the movable member, a drive shaft mounted on the support on an axis parallel to the pivotal axis of the oscillating member, and a link eccentrically connected "is engaged by the cams or cam portions l8- for e located at approximately the central portion of y,

the housing, and the aforementioned pivoted" porticn of the: oscillating member is offset outwardly therefrom, substantially as shown in Tame shaft l0, and co x any therewith, ls seg cured a'starting wheel 26 which extends through one side of the housing 'i. This wheel is adapted for starting the motor Min the event it rests at a dead center.

Thouglrl haveshown and described a particular construjction, combination, and arrangement of parts and portions, 1 do not wish to be limited to the same, but desire to include in the scope of my invention theconstruction, combination,

and arrangementsubstantially as set forth in the appended claims;

1, In a razorof thei class described a support,

link eccentrically connected at one "end to the 'of'the oscillating member the axis'of the eccentric connection of the link with the shaft being parallel to the pivotalaxis of. the oscillating member.

shaft and atits other end to the oppositerend 2. In a razor of the class described, a support,

a movable member reciprocally mounted thereon, an elongated oscillating member p'ivotally l at one end tothe shaft and at its other end to theopposite end of the oscillating member.

4. In 'a razor of the class described, a housing,

a stationary shear member, a movable shear member reciprocally mounted adjacent the former, an elongated oscillating member pivotally mounted intermediate its ends in the housing with one end connected with the movable shear member, a d-rive shaft in the housing, and a link eccentrically connected at one end to the shaft and at it-Sother end to the opposite end of the oscillating member, the axis of the eccentric connection of the link with the shaft being parallel to the pivotal axis of the oscillating member.

5. In a razor of the class described, a housing, a "stationary shear member, a movable shear member reciprocally mounted adjacent the former,an'elongated oscillating member pivotally mounted intermediate its ends in the housing with one end connected with the movable shear member, a drive shaft in the housing, an eccentric, and alink connected at one end to the eccentric and at its other end to the opposite end of the oscillating member, the axis of the eccentric being parallel to the pivotal axis of the oscillating member.

'6. In a razor of the class described, a support, a 'shear'member movably mounted on the support, an oscillating member on the support for moving the shear member, and means operatively connecting the free end of the oscillating member to theshear member, said shear member having a cylindrical recess of more than semi-circular extent and the connecting means'having a cylindrical'porti'on of more than semi-circular extent rockingly positioned in the recess, the free end of the oscillating member being slidable with re- -spect to the connecting means in a direction at rightangles' to the axis of said cylindrical port'ion.

' I INGVAR LONNE.

I REFERENCES CITED The following references are of record .in the file of..this patent:

UNI-TED STATES PATENTS Number Name Date 1,441,172 Rieger Jan. 2, 1923 2,06%,038 V Schick 'Dec. 15, 1936 "2,177,080 Schick Oct. 24, 1939 2,265,932 Wahl Dec. 9, I941 2,342,808 "JOhIISOnL; Feb. 29, 1944 'Lonne m r. July 27, 1948 

